Hair trimmer



FIG. 1 is a front elevational view of a hair trimmer showing the new design;

FIG. 2 is a back elevational view of the hair trimmer;

FIG. 3 is a top plan view of the hair trimmer;

FIG. 4 is a bottom plan view of the hair trimmer;

FIG. 5 is a right side view of the hair trimmer;

FIG. 6 is a left side view of the hair trimmer;

FIG. 7 is a front perspective view of the hair trimmer; and,

FIG. 8 is a back perspective view of the hair trimmer.

The broken lines shown in the drawings illustrate portions of the hair trimmer and form no part of the claimed design. 

The ornamental design for a hair trimmer,, as shown and described. 